CN202120657U - Underwater cable - Google Patents

Abstract

The utility model discloses an underwater cable which is characterized in that: the body of the center of the cable is wire core; the conductor having water-blocking material is wrapped by a conductor isolation strip, and the conductor isolation strip extruded by an insulating layer forms the wire core; a cable core is formed by twisting a plurality of wire cores and waterproof filling; and a cable core water-blocking isolation strip, an inner sheath, a braided reinforcing layer and a over sheath are sequentially arranged on the cable core from inside to outside. The underwater cable provided by the utility model can be used for moving laying and fixed laying, and has stronger water-blocking and waterproof capacity so that the cable can work safely and reliably underwater and the safety in production is guaranteed and the service life for the cable is prolonged. Furthermore, the underwater cable is provided with a metal armouring structure which can prevent various underwater animals damaging the cable and shield various interference from electromagnetic wave.

Description

A kind of submerged cable

Technical field

The utility model relates to the electric wire field, specifically is a kind of to rated voltage 0.6/1kV and following under water with systems such as electric power, signal controlling, information transfer and the emission waterproof armoured cable that blocks water.

Background technology

Submerged cable is mainly used in the underwater electrical equipment, realizes functions such as electric power conveying, signal controlling, information transfer and emission.The structure of the submerged cable of existing rated voltage 0.6/1kV and following grade is: after afterwards twist plastics conductor strand back or restraint earlier, extrude plastic insulation, stranding wrapped afterwards or behind the armouring again extrusion molding material sheath form.After rubber class cable generally adopts thin copper wire multiply bundle to close, be twisted into again conductor (major part is the 5th a kind of soft copper conductor), extrude the rubber insulation layer, through the sulfuration after, the stranded stranding of multicore, extrude again sheath, the sulfuration form.Reality is; All kinds of electric equipments under water (like soundd navigation and ranging, underwater lighting etc.) are in its use, and various trips under water are biological, infringement or the cable socket of shellfish are handled blow-by, cause cable directly, vertically to be intake causes equipment burnout, distorted signals phenomenon to happen occasionally because of cable receives under water; After the cable that has had even just been installed, phenomenons such as equipment burnout just appearred in a power turn-on, can not continue to come into operation and scrapped thereupon cable.The main cause that above-mentioned phenomenon occurs is: 1) lack in the construction of cable block water, watertight composition, 2) cable lacks metal armouring layer or anti-electromagnetic interference.

The utility model content

The utility model technical problem to be solved provides a kind of being difficult for by aquatic organism damage sheath, the submerged cable that the while water resistance is strengthened.

Main body in the middle of the described submerged cable of the utility model, cable is a core, and said core is wrapped conductor isolation strip outside containing the conductor of material water-proof material, and the extruded insulation layer forms outside the conductor isolation strip; Some cores add to block water to fill and are twisted into cable core, outside cable core, set gradually cable core block water isolation strip, inner sheath, braiding reinforced layer and oversheath.

But above-mentioned conductor preferably adopts the 5th type of tinned conductor.

The utility model can be used as to move to lay also to can be used as fixedly and lays, its have stronger block water, water-proof function, thereby make cable under water can safety, reliability service, guarantee to keep the safety in production, prolong cable useful life simultaneously.Be provided with the metal armouring structure in the utility model again, possess the biological damage of anti-various trips under water, play the effect of various Electromagnetic Interference under the shield water.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Embodiment

Like Fig. 1, the submerged cable of the utility model, its main body is a core, and said core is wrapped conductor isolation strip 2 outside the conductor that contains material water-proof material 1, and extruded insulation layer 3 forms outside conductor isolation strip 2; Present embodiment adopts four cores to add to block water fills 4,5 and is twisted into cable core, outside cable core, sets gradually cable core block water isolation strip 6, inner sheath 7, braiding reinforced layer 8 and oversheath 9.

1, the technical process of the utility model:

Conductor through wire drawing and annealing usually by the 5th kind of filament diameter that the soft copper conductor structure is used →Bundle closes, multiple skein should add material water-proof material when closing and twisting again, and bundle closes lay ratio ≯ 25, stranded lay ratio internal layer ≯ 18, outer ≯ 14; It is dextrad that bundle closes direction, twists direction again and is left-hand, the outer overlapping wrapped isolation strip of multiple stranded conductor →Insulation extrudes →Insulated wire cores is carried out withstand voltage test →Stranding cable core gap places the filler that blocks water, and the stranding direction is a dextrad, stranding lay ratio ≯ 14, the cable core isolation strip that outward should wrapped one deck blocks water →Extrude inner sheath →Metal base transistor layer zinc-coated wire →Oversheath extrudes →Product detects and test.

Conductor bundle close or multiple stranded conductor in contain behind the material water-proof material heavy in section vertical bag isolation strip in the extruded insulation process that adds twining package tape, small bore and look insulating material and decide; Extruded insulation layer again; Insulate then after withstand voltage test and to fill stranding with blocking water; The wrapped isolation strip that blocks water on the cable core, after extrude inner sheath, braided metal reinforced layer again.Extrude oversheath at last again.

The product technology standard of [example] SXEEU82-0.6/1 4 * 10 cables

1, conductor

Monofilament meets the requirement of TR type among the GB/T3953-2009.

Conductor structure: 7 * 12/0.40.The water blocking yarn that adds a 85dtex in the per share conductor

It is dextrad that the bundle of strand closes direction, and bundle closes lay ratio ≯ 25.

The multiple stranded conductor direction of lay is a left-hand, stranded lay ratio ≯ 14; The center adds the water blocking yarn of 2 85dtex, the polyester belt that the outer overlapping wrapped layer thickness of dextrad of conductor is 0.04mm.

D.C. resistance in the time of 20 ℃ ≯ 1.91 Ω/km.

2, insulation

Adopt XJ-30A second third Insulation Material, true qualities, digital coding 1,2,3,4, coding must use rubber to use printing ink, adopts the character wheel lettering.Distance is less than 10mm between each coding, and the insulated wire cores lettering is coated with medical talc powder.

The insulation nominal value is 1.2mm, and the insulation average thickness is not less than nominal value, and the insulation average thickness is not more than nominal value, and thinnest part thickness is not less than the 90%-0.1mm of nominal value.

Mechanical performance behind the insulation squeezing bag sulfuration: tensile strength ≮ 6.5N/mm2, elongation at break ≮ 250%.

The insulated wire cores withstand voltage test of should soaking, test voltage 2.4kV/5min does not puncture, after the test with core surface water wiped clean.

3, after-combustion

Insulated wire cores must through soak withstand voltage qualified after, carry out 10kV power frequency spark pressure test.

4, stranding

Stranding direction dextrad, stranding lay ratio ≯ 14, center and the peripheral waterproofing rope that adopts are filled.Cable core employing thickness is that the waterstop left-hand of 0.2mm is overlapping wrapped.Cable core shall be rounded up behind the stranding, tight, Stability Analysis of Structures.

5, inner sheath extrudes

Inner sheath adopts white Polyurethane EU, and the thickness nominal value is 2.0mm, and thinnest part thickness is not less than the 80%-0.2mm of nominal value.Inner sheath tensile strength ≮ 8.0N/mm2, elongation at break ≮ 175%.

6, braiding

The braided wires external diameter is 0.30mm, and the count degree is not less than 90%, braid answers uniformity, is convinced, closely, rounding, the dew scar must not be arranged.

7, oversheath

Oversheath squeezes and adopts the black pvc protective cover material, and the thickness nominal value is 1.2mm, and average thickness is not less than nominal value, and thinnest part thickness is not less than the 80%-0.2mm of nominal value.The oversheath surface can not have foaming, scratch, section pore-free, outward appearance should be closely, evenly, rounding, smooth, have no mechanical damage.

Sheath mechanical performance: tensile strength ≮ 10N/mm2, heat extends ≮ 175%.

8, cable surface lettering: factory of manufactory name, model, rated voltage, specification, length.

9, examination requirements

1, sampling test: physical dimension (conductor radical, monofilament maximum gauge, insulating sleeve thickness); The finished product withstand voltage test of under hydraulic pressure 1.0Mpa, soaking: 20 ℃ of room temperatures, soaking time is not less than 24h, should stand 3.5kV/5min, does not puncture in this test to carry out the alternative conventional immersion withstand voltage test in back.

2, routine test: D.C. resistance, insulation resistance ≮ 500 Ω km should meet the regulation requirement in the preceding text; The conventional immersion of finished product withstand voltage test: 20 ℃ of room temperatures, soaking time is not less than 24h, should stand 3.5kV/5min, does not puncture.

The concrete application approach of the utility model is a lot; The above only is a preferred implementation; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement, these improve the protection range that also should be regarded as the utility model.

Claims (2)

1. a submerged cable is characterized in that the main body in the middle of the cable is a core, and said core is wrapped conductor isolation strip (2) outside containing the conductor of material water-proof material (1), and extruded insulation layer (3) forms outside conductor isolation strip (2); Some cores add the filling that blocks water (4,5) and are twisted into cable core, outside cable core, set gradually cable core block water isolation strip (6), inner sheath (7), braiding reinforced layer (8) and oversheath (9).

2. submerged cable according to claim 1 is characterized in that conductor (1) but the 5th type of tinned conductor of employing.

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